What are the characteristics of client/server architecture?

Answer Posted / gogi ahuja

Characteristics Of Client Server

-The client / server refer to a mode of communication
between multiple computers on a network that distinguishes
one or more clients on the server: each client software can
send requests to a server. A server can be specialized in
server applications, files, terminals, or e-mail.
Characteristics of a server:
-It is initially passive (or slave, waiting for a query);
-It is listening, ready to respond to requests sent by
clients;
-When a request comes, he treats it and sends a response.
Characteristics of a client:
-It is the first active (or master);
-Sends requests to the server;
-It expects and receives responses from the server.

The client and the server must of course use the same
communication protocol. A server is generally capable of
serving multiple clients simultaneously.

Another type of network architecture is the peer (peer-to-
peer in English, or P2P), in which each computer or
software is both client and server.

Three tiers architecture, multi-thirds

The terms “three-thirds” and “multi-tier” are wrongly
translated from English Three Tier and multi-tier or n-
tier. For this reason, it would be preferable to use the
translation “three levels” and “multi-level” or a hybrid
French-English “three tier” and “multi-tier.

The client / server architecture has two types of computers
on a network: clients and servers, it has two levels and
therefore called two-tier in English. The multi-tier
architectures (or distributed) server split into several
entities (e.g., an application server which itself is a
client server database).

Comparison with distributed architectures
Benefits Of Client Server
All data are centralized on a single server, simplifying
security checks and updates data and software.
The technology supporting the client / server are more
mature than others.
A level administration server, customers have little
importance in this model, they have less need to be
administered
Disadvantages Of Client Server
If too many clients to communicate with the server at the
same time, it may not carry the load (while peer to peer
networks work better by adding new members).
If the server is no longer available, most customers do not
walk (the peer network continues to function even if many
participants leave the network).
The costs of setting up and maintenance are high.
Examples Of Client Server

The consultation pages on a website works on a client /
server. Someone connected to the network via his computer
and web browser is the client, the server consists of one
or more computers with applications that deliver the
requested pages. In this case, the HTTP communication
protocol (HTTP) is used.

E-mails are sent and received by clients and managed by a
mail server. The protocols used are SMTP, and POP or IMAP.

The management of a centralized database on a server can be
done from multiple workstations that allow you to view and
enter data.

The X Window System running on a client / server. In
general, the client process (a GUI, xeyes example) runs on
the same machine as the server but can be as well running
on another computer in the network.

A thin client computer is a light or former relying on a
central server that hosts and executes all applications.
Examples: the LTSP project, the NX technology.

Study: From Wikipedia, the free encyclopedia. The text is
available under the Creative Commons.

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